quasar | 4531e23ad4f6443dd3e0807007afd811ea1fc6a2a35f423e9ac98bcfc21be996

General

Target

0x0008000000015fc4-8.exe
Size

3.1MB
MD5

026407873fa1c229033246e574724e02
SHA1

888c874808635b0b03456da413b1941c61c33686
SHA256

4531e23ad4f6443dd3e0807007afd811ea1fc6a2a35f423e9ac98bcfc21be996
SHA512

660db81f331c9ff47440d41d2e5062d92ad1fe2b7cc5559ba120c4908b5cd9a253c4fb1da323a1f0f1e7a5ce50d04e9020aec286e3eb399cb3ebdf1b765acc7f
SSDEEP

49152:vvChBYjCO4Dt2d5aKCuVPzlEmVQL0wvwkaw2RJ6sbR3LoGdOiTHHB72eh2NT:vv8t2d5aKCuVPzlEmVQ0wvwfw2RJ62

Score

10^/10

quasar svchost 2 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svchost 2

C2

41.216.183.179:3742

Mutex

d018acac-011d-4ca3-b0c3-4fdd7ec2d6d1

Attributes

encryption_key
0325CE0E85B5B8870BB69FE8C81088DBCBFAC6F7
install_name
Host Process for Windows Tasks.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Host Process for Windows Tasks
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/2100-1-0x0000000000CD0000-0x0000000000FF4000-memory.dmp	family_quasar
behavioral2/files/0x000d000000023af9-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
700	Host Process for Windows Tasks.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe	Host Process for Windows Tasks.exe
File opened for modification	C:\Windows\system32\SubDir	Host Process for Windows Tasks.exe
File created	C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe	0x0008000000015fc4-8.exe
File opened for modification	C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe	0x0008000000015fc4-8.exe
File opened for modification	C:\Windows\system32\SubDir	0x0008000000015fc4-8.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2540	schtasks.exe
2116	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2100	0x0008000000015fc4-8.exe
Token: SeDebugPrivilege	700	Host Process for Windows Tasks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
700	Host Process for Windows Tasks.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 2540	2100	0x0008000000015fc4-8.exe	86
PID 2100 wrote to memory of 2540	2100	0x0008000000015fc4-8.exe	86
PID 2100 wrote to memory of 700	2100	0x0008000000015fc4-8.exe	88
PID 2100 wrote to memory of 700	2100	0x0008000000015fc4-8.exe	88
PID 700 wrote to memory of 2116	700	Host Process for Windows Tasks.exe	91
PID 700 wrote to memory of 2116	700	Host Process for Windows Tasks.exe	91

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\0x0008000000015fc4-8.exe
"C:\Users\Admin\AppData\Local\Temp\0x0008000000015fc4-8.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2100
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Host Process for Windows Tasks" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2540
- C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe
  "C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:700
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Host Process for Windows Tasks" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Host Process for Windows Tasks.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2116

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\SubDir\Host Process for Windows Tasks.exe

Filesize
3.1MB

MD5
026407873fa1c229033246e574724e02

SHA1
888c874808635b0b03456da413b1941c61c33686

SHA256
4531e23ad4f6443dd3e0807007afd811ea1fc6a2a35f423e9ac98bcfc21be996

SHA512
660db81f331c9ff47440d41d2e5062d92ad1fe2b7cc5559ba120c4908b5cd9a253c4fb1da323a1f0f1e7a5ce50d04e9020aec286e3eb399cb3ebdf1b765acc7f

Download Submit
memory/700-9-0x00007FFC8B0F0000-0x00007FFC8BBB1000-memory.dmp

Filesize
10.8MB

Download
memory/700-11-0x00007FFC8B0F0000-0x00007FFC8BBB1000-memory.dmp

Filesize
10.8MB

Download
memory/700-12-0x000000001C3A0000-0x000000001C3F0000-memory.dmp

Filesize
320KB

Download
memory/700-13-0x000000001C4B0000-0x000000001C562000-memory.dmp

Filesize
712KB

Download
memory/700-14-0x00007FFC8B0F0000-0x00007FFC8BBB1000-memory.dmp

Filesize
10.8MB

Download
memory/2100-0-0x00007FFC8B0F3000-0x00007FFC8B0F5000-memory.dmp

Filesize
8KB

Download
memory/2100-1-0x0000000000CD0000-0x0000000000FF4000-memory.dmp

Filesize
3.1MB

Download
memory/2100-2-0x00007FFC8B0F0000-0x00007FFC8BBB1000-memory.dmp

Filesize
10.8MB

Download
memory/2100-10-0x00007FFC8B0F0000-0x00007FFC8BBB1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads